<template>
    <svg :class="svgClass" aria-hidden="true">
        <use :xlink:href="iconClassName" :fill="color" />
    </svg>
</template>

<script setup lang="ts">
import { computed } from 'vue'
const props = defineProps({
    iconName: {
        type: String,
        required: true
    },
    className: {
        type: String,
        default: ''
    },
    color: {
        type: String,
        default: '#409eff'
    },
    size: {
        type: String,
        default: '1em'
    }
})

// 图标在 iconfont 中的名字
const iconClassName = computed(() => {
    return `#${props.iconName}`
})

// 给图标添加上类名
const svgClass = computed(() => {
    if (props.className) {
        return `svg-icon ${props.className}`
    }
    return 'svg-icon'
});
</script>

<style scoped>
.svg-icon {
    /* v-bind 是 Vue3 才支持的功能，可以将 CSS 的值与 js 的值绑定 */
    width: v-bind('props.size');
    height: v-bind('props.size');
    position: relative;
    fill: currentColor;
    vertical-align: -2px;
}
</style>